Comparative analysis of collecting mononuclear cells from peripheral blood by using Fenwal CS-3000 plus, haemonetics MCS plus and COBE spectra separators / 中国实验血液学杂志

This study was aimed to compare the collection efficiency of mononuclear cells (MNC) from peripheral blood as well as the changes of blood-related indices in patient by using 3 cell separators. MNC were collected from 94 tumor patients by using Fenwal CS-3000plus, Haemonetics MCSplus and COBE spectra separators. Routine blood test was performed before and after MNC collection to detect the potential effects of cell separators on blood-related indices in the patients. MNC count was performed. The percentages of CD3(+), CD4(+) and CD8(+) in peripheral blood cells were determined. The results showed that the MNC counts were (3.08 ± 0.79)×10(9), (3.21 ± 1.12)×10(9), and (3.22 ± 1.84)×10(9) per bag by CS-3000plus, MCSplus and COBE spectra, respectively. And the corresponding decrease of platelet percentage was (6.86 ± 5.70)%, (8.05 ± 5.14)% and (5.89 ± 4.48)%, respectively. The CD3, CD4 and CD8 ratios in peripheral blood of patients before and after treatment were significantly statistical different (P < 0.001). It is concluded that the MNC collection can be performed successfully with CS-3000plus, MCSplus and COBE spectra, and their collections can meet the needs in clinic.

Effect of various oxygen concentrations on biological function of human bone marrow hematopoietic stem/progenitor cells / 中国实验血液学杂志

Hypoxia in bone marrow is suitable for the perfect preservation of biological functions of bone marrow hematopoietic stem cells (BM HSC). It is deserved to study whether the biological functions of BM HSC are influenced when being exposed to environment of oxygen at various concentration during amplification of BM HSCs in normal oxygen condition in vitro and process of peripheral blood hematopoietic stem cell transplantation (PBSCT). This study was purposed to investigate the effects of various oxygen concentrations on biological functions of human BM HSCs. The BM HSCs were amplified in vitro, the amplification level of CD34(+) HSCs and CD34(+)AC133(+) HSCs were detected by flow cytometry, the apoptosis and cell cycle distribution of CD34(+) HSCs amplified in various oxygen concentrations were assayed by flow cytometry with Annexin V/PI double staining as well as PI and Ki-67 antibody, respectively, the differentiation of amplified CD34(+) HSCs in vitro was determined by direction differentiation assay, the migration ability of amplified CD34(+)AC133(+) HSCs was measured by migration test. The results indicated that the oxygen environment below normal oxygen, especially hypoxia, could amplify more primitive CD34(+)AC133(+) HSCs and CD34(+) HSCs with activity, arrest more HSCs in G₀/G₁ phase, promote the generation of BFU-E, CFU-GM, CFU-GEMM, and better preserve the migration ability of HSCs. While the above functional indicators of BM HSCs were poor when HSCs exposed to normoxia, oxygen-unstable and oxygen-severe changeable environments. It is concluded that the biological functions of BM HSCs in PBSCT are related with oxygen concentration and its stability, the culture of BM HSCs in lower oxygen environment may be more beneficial for PBSCT.